Professional Detailing2 min read

Surface-Tension Results: State Whether the Interface Is Liquid-Air or Liquid-Liquid

A tension measurement must identify the two phases at the interface. A liquid-air result and a liquid-liquid result should not be merged under one unexplained property label.

Updated · NANOLAB Knowledge

The key distinction

The interface is part of the quantity being measured. For coating development, the relevant test depends on the actual technical question, and a value from another phase combination may not answer it.

Practical checks

  1. Name both phases and their condition.
  2. Record the method and temperature.
  3. Compare only results whose interface and procedure support the intended question.

Example

Illustrative example: a laboratory measures a coating-related liquid against another liquid, while a purchasing table labels the value as its surface tension in air. The altered description changes the meaning of the result.

Scope and limits

Do not select an additive or change a finished coating based on an unrelated tension value. Qualified formulation and method review are needed for the actual system.

Related guidance

Technical references: KRUSS: pendant-drop technical note. These sources describe their stated methods or products; they do not certify NANOLAB products or establish compatibility with an unlisted surface.

Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.

Professional Detailing2 min read

Salt-Spray Results for Nano Coatings on Metal

Interpret salt-spray reports for nano-coated metals by checking the complete specimen system, acceptance criteria and limits of outdoor-life predictions.